Here is some info from a web site. Perhaps the most intriguing and least understood of all the Winchester bolt-action .22 rimfire rifles are the factory-scoped models. The Models 67, 68, 69 and 72 were at one point in time available with scopes only or a combination of open sights and scopes. Proof marks on these scoped rifles were usually relocated to prevent the rear scope block from covering them. Scopes supplied were either 2-3/4 or 5 power. Scopes themselves were not marked Winchester but the front ring was. The combination rifles were called dual sight with scopes mounted on V blocks through which the open sights could be seen and utilized.